Which of the following is not a function of the strong hydrochloric acid present in the gastric juice?
a. the activation of pepsin
b. denature proteins
c. kill bacteria in food
d. breakdown starch
e. aid protein digestion

d. breakdown starch

Explanation:

The hydrochloric acid is produced by the parietal cells of the gastric glands present in the stomach. The primary function of the hydrochloric acid is to sterilize the food consumed by the human being. The acidic pH is unsuitable for the survival of the microbes present in the stomach. It triggers the activation of enzyme pepsin which is responsible for denaturation of proteins. The pepsin converts the protein into simple form of amino acids hence, facilitates the digestion of protein content in food.

The starch present in the food is digested by the enzyme called as salivary amylase present in the saliva present inside the mouth. The breakdown and digestion of starch is not the function of the hydrochloric acid.

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